Her school friends had campaigned on her behalf and started a petition signed by more than 170,000 people, calling for her to be allowed to complete her exams in the UK. Speaking from Mauritius, Yashika told ITV News she was scared and alone, and did not know what to do.

Video report from UK Editor Lucy Manning.

The teenager described to ITV News how difficult her deportation was: She was taken from Yarl's Wood Immigration Removal Centre, told she was flying the same night, did not get to see her family before she left, and was accompanied by four security guards on the flight.

The letter, across three pages, details how Yashika's case was decided, and the factors that prompted the court's decision. Mr Brokenshire says he has personally reviewed the case again and said he "did not consider it appropriate to intervene in this case".

Speaking from Mauritius, the teenager urged the government to reconsider, and allow her back to the UK to finish her A-levels, and enable her to "have the future" she has worked for.

She said the Mauritian authorities have not helped her, and that she was really scared.